Wireless ultrasound inspections using Piezoelectric Wafer Active Sensors (PWAS) are attractive for Structural Health Monitoring (SHM). However, the impedance mismatch between the PWAS and the wireless transponder reduces the wirelessly transmitted signal strength. Electrical Impedance Matching (EIM) circuit can be introduced to maximize the power transmission between the PWAS and the wireless transponder. This paper discusses the wireless excitation of ultrasound as well as the design, simulation, and characterization of the EIM networks for PWAS. To maximize power transmission, a two port EIM network was developed using a computerized smith chart. The equivalent circuit of the PWAS and the EIM network were then combined to establish the equivalent circuit of the matched transducer. Computer simulations were carried out to evaluate the gain, the bandwidth, and the sensitivity of the EIM networks. Two-port EIM networks were implemented for both the actuator and the sensor in an ultrasound pitch-catch inspection system. The performance of the pitch-catch systems with and without the EIM networks was compared. Detailed analysis, simulation, hardware implementation, and measurement results are presented.
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ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 19–21, 2012
Stone Mountain, Georgia, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-4510-3
PROCEEDINGS PAPER
Wireless Excitation and Electrical Impedance Matching of Piezoelectric Wafer Active Sensors
Rashed Hossain Bhuiyan,
Rashed Hossain Bhuiyan
The University of Texas at Arlington, Arlington, TX
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MD Mazharul Islam,
MD Mazharul Islam
The University of Texas at Arlington, Arlington, TX
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Haiying Huang
Haiying Huang
The University of Texas at Arlington, Arlington, TX
Search for other works by this author on:
Rashed Hossain Bhuiyan
The University of Texas at Arlington, Arlington, TX
MD Mazharul Islam
The University of Texas at Arlington, Arlington, TX
Haiying Huang
The University of Texas at Arlington, Arlington, TX
Paper No:
SMASIS2012-8210, pp. 271-276; 6 pages
Published Online:
July 24, 2013
Citation
Bhuiyan, RH, Islam, MM, & Huang, H. "Wireless Excitation and Electrical Impedance Matching of Piezoelectric Wafer Active Sensors." Proceedings of the ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. Volume 2: Mechanics and Behavior of Active Materials; Integrated System Design and Implementation; Bio-Inspired Materials and Systems; Energy Harvesting. Stone Mountain, Georgia, USA. September 19–21, 2012. pp. 271-276. ASME. https://doi.org/10.1115/SMASIS2012-8210
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